Yeah, especially with one-off scripts I keep upgrading my machine / reinstalling to clean things up, and wondering wtf -nRT means and why I thought it was important. Something like half the time I google / manpage around for a while and find out it wasn't important, or assumed something incorrect about what it was trying to do.

I've started wrapping everything I do frequently in small bash scripts, and documenting what and why. Saves a lot of time when migrating to a new system, since I can glance and say "nope, don't need it" within a couple seconds, or remember why it was useful (and sitting in a cronjob somewhere) and reinstall the things I actually use.